/*
 * Copyright (c) 2002-2009 JGoodies Karsten Lentzsch. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  o Neither the name of JGoodies Karsten Lentzsch nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.jgoodies.forms.util;

import java.awt.Component;

/**
 * An interface that describes how to convert general sizes to pixel sizes.
 * For example, <i>dialog units</i> require a conversion that honors
 * the font and resolution. The {@link com.jgoodies.forms.layout.Sizes} class
 * delegates all size conversions to an implementation of this interface.
 *
 * @author Karsten Lentzsch
 * @version $Revision: 1.6 $
 * @see    com.jgoodies.forms.layout.Sizes
 * @see    com.jgoodies.forms.layout.ConstantSize
 * @see    AbstractUnitConverter
 * @see    DefaultUnitConverter
 */
public interface UnitConverter {


    /**
     * Converts Inches and returns pixels using the specified resolution.
     *
     * @param in         the Inches
     * @param component  the component that provides the graphics object
     * @return the given Inches as pixels
     */
    int inchAsPixel(double in, Component component);


    /**
     * Converts Millimeters and returns pixels using the resolution of the
     * given component's graphics object.
     *
     * @param mm         Millimeters
     * @param component  the component that provides the graphics object
     * @return the given Millimeters as pixels
     */
    int millimeterAsPixel(double mm, Component component);


    /**
     * Converts Centimeters and returns pixels using the resolution of the
     * given component's graphics object.
     *
     * @param cm         Centimeters
     * @param component  the component that provides the graphics object
     * @return the given Centimeters as pixels
     */
    int centimeterAsPixel(double cm, Component component);


    /**
     * Converts DTP Points and returns pixels using the resolution of the
     * given component's graphics object.
     *
     * @param pt          DTP Points
     * @param component   the component that provides the graphics object
     * @return the given Points as pixels
     */
    int pointAsPixel(int pt, Component component);


    /**
     * Converts horizontal dialog units and returns pixels.
     * Honors the resolution, dialog font size, platform and look&amp;feel.
     *
     * @param dluX       the horizontal dialog units
     * @param component  a component that provides the font and graphics
     * @return the given horizontal dialog units as pixels
     */
    int dialogUnitXAsPixel(int dluX, Component component);


    /**
     * Converts vertical dialog units and returns pixels.
     * Honors the resolution, dialog font size, platform and look&amp;feel.
     *
     * @param dluY       the vertical dialog units
     * @param component  a component that provides the font and graphics
     * @return the given vertical dialog units as pixels
     */
    int dialogUnitYAsPixel(int dluY, Component component);


}
